Answer:
(B) taxing the sellers of the product.
Explanation:
Spillover is the economic activity wherein one event is effected by unrelated event or context. As cost of production have some affect on the demand and supply schedule.
Similarly in the given case, if government subsidize the buyers of the product, subsidize the sellers of the product or providing the product itself will have spillover benefit from the product in a society, however, taxing the seller product will not have any benefit to the society as it increase the price of product.